This standalone game/mod running on the GZDoom engine is a hidden gem. The custom sprites, weapons and environments are excellently crafted and the midi music fits the game well. This is one of the few games that doesn't have annoying enemies, while except the flying eyes which resurrect enemies, but they easy to deal with. The only "negative" I have is that the story isn't in depth but that is to be expected from games during the 90s which this game takes inspiration from but it has a satisfying conclusion so I'd give them that. Overall if you like Doom or any first person shooters I'd highly recommend you give this game a try.